Radiator installation for motor vehicles



M. ToTH RADIATOR INSTALLATION FOR MOTOR VEHICLES Nov. `27, 1951 5 Sheets-Sheet l Filed Nov. 28, 1947 M. TOTH RADIATOR INSTALLATION FOR MOTOR VEHICLES Nov. 27, 1951 3 Sheets-Sheet 2 Filed Nov. 28, 1947 Nov. 27, 1951 M, TOTH 2,576,316

RADIATOR INSTALLATION FOR MOTOR VEHICLES Fil-ed Nov. 28, 1947 3 Sheets-Sheet 5 Patented Nov. 27, 1951 RADIATOR INSTALLATION FOR MOTOR VEHICLES Michael Toth, Springfield, Ill., assignor toAllis- Chalmers Manufacturing Company, Milwaukee, Wis., a corporation of Delaware Application November 28, 1947, Serial No. 788,335

1 Claim.

The invention relates to radiator installations for motor vehicles, and it is concerned more particularly with an enclosing structure for the radiator proper, that is, with an enclosing structure for a tank and core assembly which forms the heat exchanger of the installation. y

In heavy duty motor vehicles, such as tractors, and which are equipped with a shell structure for protecting and concealing the top and sides of the radiator, such shell structures have heretofore been constructed of sheet or plate metal, and in certain instances of the prior art a selfcontained radiator unit comprising an upper and a lower tank and a finned tube assembly, has been connected in supported relation with such shell structure. In such installations it has been observed that the radiator unit is apt to become leaky due to weaving and flexing of the shell structure during operation of the vehicle, and this difficulty has been found to be aggravated in motor vehicles which require a radiator of relatively large capacity and a correspondingly large size radiator shell.

Generally, it is an object of the invention to provide an improved sheet or plate metal radiator shell which will take care of the requirement for substantial stiiness or rigidity of the shell in a practical and relatively simple manner.

More specifically, it is an object of the invention to provide an improved form of internal reinforcement for a sheet or plate metal radiator shell, which will render such shell adequately strong so that it will not only support itself under severe operating `conditions of the motor vehicle, but so that it may also safely serve as a support for various accessories, as for instance a self-contained radiator unit, a swingable grill structure for the shell, and/or various types of allied equipment for the motor vehicle.

These and other objects and advantages are attained by the present invention, various novel features of which will be apparent from the description herein and the accompanying drawings disclosing and embodiment of the invention, and will be more particularly pointed out in the accompanying claim.

, Referring to the drawings:

Fig. 1 is a side view of a radiator installation for a motor vehicle;

Fig. 2 is a front view of the installation shown in Fig. 1, parts of the grill being broken away to expose a pair of hinges; f

Fig. 3 is a sectional side view showing radiator parts of Fig. l in elevation and shell and grill parts in section on line III-fIII of Fig. 4;

Fig. 4 is a sectional top view showing radiator-and grill parts of Fig. 1 in elevation, and shell parts in section on line IV--IV of Fig. 3;

Fig. 5 is a, rear view of shell, radiator and other parts shown in Fig. 1;

Figs. 6 and 7 are sectional views on lines VI-VI and VII-' VlI, respectively, of Fig. 5;

Fig. 8 isan enlarged top View of a latch mechanism shown in Fig. 4;

Fig. 9 is a rear view of the latch mechanism shown in Fig. 8; and

Fig. 10 is an enlarged detail view in section on line X-X of Fig. 3.

Referring to Figs. 1, 2 and 5, a, heavy cross member I forms the front bumper of a heavy duty motor vehicle, such as a crawler tractor (not shown), and horizontally spaced side members 2 and 3 (Fig. 5) of the vehicle frame are rigidly connected, at their 'forward ends, to the cross member I in conventional manner. An internal combustion engine 4, the forward part of which is shown in Fig. 1, is mounted between the side frame members 2 and 3 in rearwardly spaced relation to the front cross member I; and in conformity with accepted practice, a radiator cooling fan 6 is operatively mounted in front of the engine and driven by belts 'I from a pulley 8 on the crank shaft of the engine.

A radiator shell in front of the engine 4 is mounted, as shown in Figs. 1 and 5, on the side members 2 and 3 of the vehicle frame, and mounted within said shell, as will be more fully explained hereinbelow, is a self-contained radiator unit which comprises a top tank 9, a bottom tank II, and a finned tube assembly or core I2 (Fig. 3). The radiator tanks and tubes are interconnected and function in conformity with well-knownl principles, and the entire radiator unit is of relatively light and correspondingly inexpensive construction. The top tank 9 has a ller stud I3 which carries a closure cap I4, and a flanged fitting I6 for connecting the upper tank 9 with the water jacket of the engine is detachably secured to the rear wall of the upper tank by cap screws I1,.as shown in Figs. 3 and 4.

, The lower tank I I has a bottom opening to which curved and terminates in a horizontaledge 21...

which is curved transversely dfthevehicle.

deector 28 is secured to the tcp member 2|, asY

by welding, in front of the 'radiatorcap I4 for purposes of protection. As best shown in' Fig.Y 5,V`

the side plates 22 and 23 of the shell are con-` nected with the side membersv,andLrespecpL tively, of the Vehicle frame by means of foot plates 2S and 3|, and bolts 32 and 33, the' foot plates being welded to the. lower ends of the side plates at; the inner sides .of the. latter. Asshown in;Fig.. 4, the Ibolts. 32,. and.` 33 .extend through holes; atthe. rear endsof thefoot .plateslll` and. 3'I,: respectiv.ely,V and an additionalset. of bolts (Fig. 3), is provided to., secure. the footplates at.y their forward ends .to the. side. members .2 .and 3, respectively, of .thevehicleframe The shell part. formed. by. the. top. member. 2| and by the side members 22. and.23 is internally reinforced. by..fa web .generally designated by. the reference character 34, andfwhich `is .shown in sectiorrinFigs` 3 Aandtfl, and. part .of which Ais shown in rear elevation in Fig.5.' The horizontal widthv of .theweb conformssubstantially .withthe transverse .spacing between the. inner surfaces of the side members;22 and 23.andweldedseams along theV straightoppositelside edges of the Web connectthe latter'with the side .plates 22.and.23. atthe'. inner sides of theilatter. As yshown in. Fig.` 3, the web. 34.extends..upwardly into the. dome. shaped top part 2| of theshell, and the upper edge of'the web is curved to -.confor-m with. the V`curvature of the insidesurface of. the top part 2 I members 2I..and. 22', 'thewebl 34. is secured. by. a

welded seam along itsupper edge tothe inside The. lower edge 36 of large, generally square fenestral 'aperture of the web 34', the lower andupper edges of. thefenestral aperture being designated'-in-1Fig.. 3Jby the refierence characters 35 and 38, respectively,`and thehe'ight and'widthof the fenestral'aperture conforming substantially with the height and' width, respectively, of the core-'I2of'the radiator unit. The fan 6 operates to draw air rearwardly through the core section ofthe radiatorunit and. through lthe fenestral aperture of tle reinforcingl web- 34.1 Tlie tapered fan shroud 39? extendsrearwardly'from the web.34..into axiallyoverlapping relation witntne fan aandservs 'to-direct 'the cooling" air throughtthe radiator shell.

Referring to Fig. 5, the structure forming the web 34 and the fan shroud 39 comprises four dieshaped plate members 'or' reinforcing platesV 4 I, 42,'74'3 and 44, which vare joined together by Weldedy seams alongl` diagonal lines 46,141; 48- and 49. TheV bottom section 4| has a relatively In additionto being secured to 'the side.

short sk'irt portion-50;?lb'est shown in Figs; Gand 7,1'

which:extendslverticallyl .inV the" plane of theV web?v Y plate. member. 43.

I 34, and a slanting portion 5I. The slanting portion 5I merges with the skirt portion 5|) along crease lines 52 and 53 which are slightly inclined relative to each other, as shown in Fig. 5, and the bottom edge 35 of the fenestral aperture of the web 34 extends along said crease lines 52 and 53." The'slope of the slanting portion 5I is relatively-steep atY thefcenter of the section 4I, as shown in Fig. 6, and becomes gradually more gentle at the lateral parts of the section 4I, as indicatedlbyFiggl. The plate members 42, 43 and '4'4"a're` shaped similar to the plate member 4|, but the skirt portions of the plate members 42Ja`r'1d44 shown-in Fig. 4, and the skirt portion ofthe plate member 43, as shown in Fig. 3,

"are wider than the skirt portion of the plate member, 4|. i InlvFig, 5, the reference characters 52 and 53 have also been applied to the crease lines of -each of the plate members 42, 43, and 44. The vertical edges of the fenestral aperture at the.. wide; end ofthefan shroud SSifeXtend along the, crease lines. of the plate v.members 42and ,44,

respectively, vand the top edge 36 of the Ienestral. aperture extendsialong .the crease lines of the The.. bottom edge StY of the.- web 34 extendsin linewith lowerhorizontal edge.

portions. of the. plate members ,42 and 44,. and the skirt portion of the top plate member43' is joined.

with horizontal to'p edgesof ,the .plate members 42.-,and 441m. lines 42' and 44.',respectively,V as

shown 4in Fig. 5. The 'fan shroud 39 has a cire.

cular, beaded vrear edge 54..-surroundin...fA the vfan 6..substantially inl. thecent'er plane: .of the. latter..

The.,top andside4 membersl ,1 22`-and 123 ofthe shell, as well'as thelreinforcingplates .4I .-to..44,k

are' formed o'relativelyheavy gaugejsheet metal. stock, andsu'itable blanksfor the .plates 4I to 44:v

are cut from such stockand'shaped lbetv'veenza pair of dies before the platesiare welded together` and to thel shell', vas 'shown' in .Fig..5.. The web 34'- and the fan shroud `3.9.=.coactY to. stiffen vthe..web by, the fan. shroud. and, conversely, to stiien the fan shroud by the web, and the combined web and fan shroud affordlanample reinforcement for the sh'e1l.2I,:22,.23t/to render theA latter adequately. stro'ng so that it will. not only. support itself under.. severe operating conditions of the motor vehicleon which it is vmoun'tedybut. so that it mayfalso': safely serve as a support for Various accessriessuch' asthe radiator unit 9, II, I 2,"

and/or. a swingableA grillfstru'cture for the shell;` as will be described rnoreifully hereinbelow.

'Referring' tolEigs, 3`and. 4,3. a pair of vertical` reinforcing SanglesA 53' andl51. are positionecLre'- spectively,..at the .inner sides .of' the. side.,1 clates.v 22..and.123,. each.reinforcing.Sangley having-one fiange therefgsetLnedge against the front face. ofthereinforcingweb .34,.an`ditsother flange` set on edge against therespective:s'ide' plate; The reinforcing` .angle 53: extends all. the wayfrom thefoot' plate'Zgin'tothe top.me1nber 2|, .and it is secured by. a Welded; seam alongA the edgeof its.front..flang`e to theinner. side of the plateV 22 andlto--theuinnerside ofltheltop' member 2|', and by. anotherl weldedseam along.A the edge of its side ange to the front face of the .web 34;. .At itsV lower end, the reinforcing kanglez5t alsoLwelded to .the foot plate 29.'. .The reinforcing-anglel is similarly secured to the innerside of the plate 23,tothe inner-.side ofthe top memberl 21|,.to" the fronti face oflthe'"web:-34,5and.;to the foot plate 3| 'I'he fan shroud 33 and thefradiator unit comprising the tanks.9 and' II and the'tube assembly I 2 tare arranged at` opposite sides, respectively,v of 7 5 the reinforcing"web34yard Athe tubeassembly l2' is positioned in confrontingrelation torthe wide end of the tapered fan shroud 39. f

In the ,embodiment of. the invention been selected for illustration by the drawings, the mentioned reinforced structure includes the reinforcing angles 56 and 51and theradiator unit is mounted on rand supportedby these reinforcing angles. To that end, apair ofmounting fins 58 and 59 are formed at opposite sides,

respectively, of the radiator unit, and1l six ver'-Y tically spaced rubber mounts 6| are arranged at each side of the radiator unit for connecting the.

fin 58 with the angle 56, and'for connecting vthe iin 59 with the angle 51. VAs showninFig. 3, the rubber mounts 6| in front of the angle 56 are supported, respectively, by bolts 82, each of.

these bolts extending through the front flange of the angle 56 and through the web 34and car-v rying a nut 63 in rear of the web 34. The. rub-v ber mounts 6| in front of the angle 51 are similarly supported, respectively, by bolts .62 which extend through the front flange of the angle '51 and through the portion of thewe'b 34 in rear of said flange (Fig. 4).

The details of construction are the same for all of the rubber mounts 6| and are shown more clearly in Fig. 10. As shown in said figure, a metal sleeve 64 surrounding the shank of the bolt 62 is in turn surrounded by a rubber sleeve 66, and both sleeves extend through an aperture' of the mounting iin 58. Rubber ringsA Eiland 68 surround the sleeve 66 in front 'and rear, respectively, of the n 58. The head of the bolt 62 bears against a metal Washer 69, and in the condition of the parts as shown, in Fig. 16, the

rubber sleeve 66 and the rubber rings 61 and 68 tor unit is mounted in operative position asshown` in the drawings.

Referring to Figs. 1 and 2, a grill, generally designated by the reference character 12, extends in front of the radiator unit below the forwardlyoverhanging part of the top memberZL of; the radiator shell. The grill 12 comprises an as. sembly of horizontal and vertical members which are rigidly interconnected to form a gate structure which is hingedv to the radiator shell by means of a pair of hinges 13 and 14, as lshown at the left of Fig. 2. Vertical side strips 16 and 11 of the grill are connected at their lower ends to a transverse plate strip 16, and terminate at their upper ends in proximity to the horizontal edge 21 of the top member 2| of the shell. Next to the edge 21, the side strips 16 and 11 are connected with each other by a horizontally disposed round grill bar 19 which extends 'in a curved'ver-I tical plane as shown in Fig. 4, the curvature of said plane conforming with the horizontal curvature of the edge 21. Below the top grill bar 19 the side strips 16 and 11 are connected with eachV other by a group of four round grill bars 80, which generally follow the curvature of the mentioned plane, but portions of which are curved out of A said plane and form head lamp receiving cavities 89Mand 9|, at the inner vside of the grill, as shown,

which has inFig. 4. Below the group of grill bars 89, the

side strips 16 and 11 are connected with each other by a group of five round grill bars 19 which are duplicates of the top grill bar 19 and extend in the same curved plane as the latter. One grill bar 19' approximately midway between the top and bottom of the grill, is connected at its left end, in Fig. 2, with the side strip 16, and terminates at its right end a short .distance from the` side strip 11, to provide access to a latch mecha.

nism which will be described more fully hereinbelow. The grill bar 19 extends in the same curved plane as the top grill bar 19. Below the grill bar 19', the side strips 16 and 11 are connected wtih each other by a group of nine grill bars 19 which are duplicates of the top grill bar 19 and extend in the same curved plane as the latter.

A vertical center strip 8| at the forward side of the grill is connected to each of the grill bars 19, 19' and 89, and to the plate strip 18. At the inner side of the grill, the bars 19, 19 and 80 and the plate strip 18 are interconnected by a pair of vertical relatively long strips 82 and 82, and another inner pair of relatively shorter verticall strips 83 and 83 are connected to the bottom strip 18 and also to the grill bars 19 and 19 below the grill bars 80.

The upper hinge 13 comprises a block 84 which is welded to the inner side of the side plate 23 of the shell, and a curved hinge arm 86 (Fig. 4) which is welded to the inner side of the vertical side member 16 of the grill, and which is pivotally connected with the block 84 by a bolt 81. The shank of the bolt 81 extends through a bore of the block 84 and is screwed into a tapped hole of the hinge arm 86. A stop nut 88 (Fig. 2) on p the bolt 81 rests on the block 84 and is suitably locked in adjusted position to secure the bolt 81 in rotatable and axially fixed relation to the block 84.

rIvhe foregoing explanations with respect to the construction of the upper hinge 13 similarly apply to the lower hin-ge 14, the parts of the lower hinge being designated by the same reference characters as the corresponding parts of the upper hinge.

ment of the grill relative to the shell by rotary adjustment of the bolts 81 in the tapped holes of the hinge arms 86.

It will be noted that the grill 12 is swingable about a vertical axis at the inner side of the side member 23 of the shell, and that the grill may be swung about said axis from the transverse position between the side members 22 and 23 of the shell, in which it is shown in Fig. 4, into an open position which will expose the radiator unit for inspection and cleaning, and for removal of the entire radiator unit forwardly from the shell, for purposes of repair when necessary.

Apair of head lamps 92 and 93 which project into the cavities 89 and 9|, respectively, of the grill when the latter is closed, as shown in Fig. 4, are mounted on the radiator unit by means of brackets 94 and 96, respectively. The bracket 94` is'bolted to a plate 91 (Fig. 3) which is secured to the side of the radiator unit in front of the mounting n 58, and the head lamp bracket 96 is ,similarlyv bolted to a plate 98 which is secured to the side of the radiator in front of the mounting Referring to Figs. 2 and 4, a latch mechanism is operatively interposed between the shell and the swinging side of the grill 12 in ordertoref The described construction of the' hinges 13 and 14 permits up and down adjustf' 7; leasably :secure the. .grilli in its'. lclosedipos'itioninl which .i'ts shown'linsaidlg'uresif The details. of. construction'. of' the 'latch mechanism .are ,slfiovvnl more .clearly in Figs and ggian'dasishown in these -gures,. a` .pair. ofy Vbracket Vplates 9.' and .l-il.. 5 are; secured Vin Verticallyspacedf relationatoieach.. other-.on theinnerzside. of v.tl'iezplate member 22g'.- Alswivel .pin L32fispivotally. mounted'gatlits ope. posite .endsin thezbracket-plates. de. and.. ici and a .latch .boltl is screwed into .athreadedbore 10 of .the swivel pin .I B2 for adj ustrnent'` ini the direc@ tion .of :its axisgand :transversely of Lthe swivel* pin m2; betweenfthe ibra'cket plates' 99. aridi! Si. "A cross pin |94 isiswiyeledicnithelatch bolt H53 and, isJseatedirila hookediend ofaxbracketili' which-.15 is secured toithe'inner .side ot .the 'side strip: "i 'tot the. grill ,3 '.Thehooked .end of. thebracket I G6 has an open ended slot IE5 accommodating the shank:A otheboltilil. andia pairofprongs l@ 1.6.3, attheotherend.- of thebracket'i, straddle the 20. bracket plates. 95 and .I..i '.soas to secureth'e swinging. sideof the grill' l2 against lup.and.do\vnmovement relative. tothesidelplate 225621". the shell. The. latch. bolt Iii3carri'es pair o;"- stop nii-ts l S9 rearwardly o`fl.the..bracket. plates Tfandl ii-Iif;

f .lilig..8 f'shows fthe .latchmecha-nisni. inf-'itsl lockedcondition.. in fwhich. iti secures :the .grillfa'gainst swinging movement about the axis of the'hinges. 'lisand 'M JThe Ahead ofthe bolt iie. isaccessible through .the spacelbetweenxthe.grillbars 'ES' alcove` 3Ql and .blowtheugrillbar 'lly'asshown in .2, and. in. order to .unlock .thelatchpthe b'oltl i531 turned-soasto permitunseating of thecross pin LM (Fig. 8)1frornthe-.hookedend ofthebrack'et L05. .L 'Ehebolt H33..togetherwith the cross .pinl fue 35.; may thenbe swungabo'ut .the axisofltheswivel pin IlZfsov as toi release. the.. grill` forjswingingmovement about theaxis ci. '.thelhi-nges i3 and M..y Inlorder tolockthe lgrill its iclosedposition; the latchb'olt l3isswung backfinto Athe slct'of: the. 40E hooked end of the bracket NBE and it is their` turned so .as to. vforcethe .crosshpinii ruponlthe hookedend of vthe hraketgi;

It will tbe noted ,that the hinges .i3 and .ld and.. thelatchfmech'anism comprising the boltl are locatedllbetweengthe.planes of. the'. side ,.plates 22.v and 23.01. the shell, and'. accordingly, neither the., hingesnor. the. vlatch 1 mechanism. interferewith the. up and .downlrnoven'ient.or".- bulldozer.. arms. orth'e .like which maybemounted .on thevehicle 5o.. and extend forwardly beyond. the.radiator...shel` iiif-.closelproximity.to the` opposite sidesf...of the latter;

V.'.I'hefan Eis operative, as stated.hereinbefore,L to.- draw .airlrearwardly through Ythe core 4section.v |21 of. the radiator `uriit,and asbest. shownA in Figs; lv and .5, a protecting screen. I'll for theY fan" is mounted in .rear-of the latteron the fan shroud 39by means .of strap metal brackets H2 which Aare spaced from eachother .circumferene4 tially of the fan shroudand which are weldedvr to the "outer surface of the latter.' The screen l-'Iillhas suitable spacer? clips I|-3 lwhichare con. Elected` with the brackets H2 .'.by' boltsdlld.'

' Referring againY to Fig. 3, the grill'fflZf has -aY 65 o'allelll which, in theclosed position .of-the grill 3 i extends-horizontally :a short 'distance under. thetradiator unit in closeproximity to the-.bottom-l side of the latter. Th'eb'ai'le plate .IIB has a curved forward .edgewhose curvature conforms 70 withY the. curvaturev of. the inside surface of the plate strip 18 of the grill, and the baille is welded along its'curved forward edge to theinner side of. the 'plate Vstrip. 78;` The bafflel plate H6 vis properlyV dimensi'ned' so 'as toiv substantially seal 75 Si. the. horizontalgapjaetyveen theradiator vunit and. the plate strip 18,.of.the5.g'rill2when.th'e. latter' is. in- .itsf...fclosedf. position, and accordingly,V when the 1 fanV isi operative :tot draw. air. rearwardly. into theshell; theabaile .|16 willbeoperative toA direct sucheairetowardthe radiator unit.

A.In .generallterms the. herein4 disclosed. improved motor .Nehicle frontv assembly .comprises a plate. metal. top: section, afpair; of uprightplate metal.A side.' sections'. under :said top.: section and. con. nectedywith. the latter. .to..form `an inverted. U.. shaped structure, .zsaidztopisection having an .upal wardly4 arched..- wall portion spanningY .said side. sectionsyand av forwardly-extended1 .portion over` hanging4 vthe front edges-.of said. side. sections .and closediatvits top, frontgand-.lsides In .thegillus-fn trated. embodiment Aofmthe invention, the men-. tioned :plate metal:.top. .section is represented-.bythe. dome shapedxsheet metalstamping. 2l., and.v the mentionedsidesections lare rep-resented bythe. sidemembers 22 .and 23.

Atthe lower. endsiofthe side sections.` ofthe inverted U-shapedstructure are means fortrigidf. 1y mounting the latter on a lpairiof transversely spaced. frame' .members of a A`motor vehicle-:such means .being represented. inthe. illustrated.. em'. bodiment ofthe inventionv by.. the. foot plates 29. and Land bythelbolts 321-and 33..-

' The improvedymotor vehiclefront. assembly further-.comprises a -webmernber secured toand` extendingyfrom.- the inner.- sides of saidside sections and beingdishedto forma fan` shroudwith in -saids1U-'shaped .structure,..said web. 4mem-berV having an upper.v .edge portion eonnected with the. innen-iside .of said? upwardlyrarchedl wall Aportionof. the-top section,..andu.being. formed.. ofn plate.Y material.A of; :su'lostantialI thickness so that said. Ufshaped structure will.be'isubstantiallyre-. inforcedbysaidweb member. In theillustrated embodimentof'the invention such web-member comprises-thafounplate membersit, 42; .43 and 44.1.which medie-shaped. and welded 'togetherr theweb .member .as a' 'whole being dished toform the fan shroud 39. Means are connected1 with im the .web member' for securing va radiator unit within fthe U''shapedystructure -rearward1y ofi-- said` forwardly extended portionV of-the latter,v such 'ineansinlthe illustrated embodiment'Ao-lthe invention including the bolts 62. It srli'o'uldg*be4 understood thati-tis not intended tofi'ir'ni'tthe raven-tieni tothe kparticuiarforms and details`=dc$cribed hereinabove and that the invention includes su 'H other forms and" modifications efllecdlby the'scope of the appended rned anddesired to secure by lLetters f otor yehiclefront..assembly ,comprisinglnL ti plate `rnetal top section, a pair of l side sections under said Atop elctedfwith the latter toforrn'an pjegdj,structure,` said 'top section yardly' arched' wall Iportion Yspant .a forwardly ext d irontf'edgeis'fof saids e Y.. Clesjed at its.t0n..,frontfa1d sidesj. meansatgihglvver endsof said. side Sections rior rigi'dly'prnounting 'said inverted U`shape1dstruc-4 ture 'on a pair' of transversely spac'edfrarne meinblers of a otor vehicle;A a web member secured to andextend'ing vfro'n'i the inner sides of said side sections andibeing d ished to form a fan shroudV withinsaidf'll-shaped'structur, said web mem@ bernaving uppei-edgeportion connected with; the ieris1deof--`said upwarciy'arched wan per:

tion, and being formed of plate material of substantial thickness so that said U-shaped structure will be substantially reinforced by said web member; and a pair of upright reinforcing angles positioned, respectively, at the inner sides of said side sections, each reinforcing angle having one of its anges set on edge against and secured to said web member, and having its other ange set on edge against and secured to the respective side member.

MCHAEL TOTH.

REFERENCES CITED UNITED STATES PATENTS Name Date Ross Apr. 12, 1921 Number Number 10 Name Date Cutler July 20, 1926 Cutler July 20, 1926 Wilson June 7, 1927 Griese Nov. 8, 1927 Young Dec. 11, 1928 Schneider Aug. 6, 1929 Smith Apr. 22, 1930 Schulman Dec. 29, 1931 Northup July 6, 1937 Schjolin May 10, 1938 Baker et al Mar. 28, 1939 Agerell et a1 Aug. 22, 1939 Morris Sept. 19, 1939 Brock et al. May 3, 1949 

